The professors of law at the Faculty of Law of the University of Vilnius were: Simon Dilger, John George Schauer and Aaron Alexander Olizarowski. On the other hand it raises doubts whether, in accordance with the act of foundation, only one chair of civil law (Roman) were established. Undoubtedly, canon law was taught at the two cathedrals. With high probability, Aaron Alexander Olizarowski also taught canon law. However, all indications are that he could take second chair in civil law (Roman) and lectures on this discipline. It is true that Aaron Alexander Olizarowski also promoted a few doctors of canon law, but in this period Vilnius Academy were other specialists who are likely to teach canon law. In addition, he was a layman, which cou...